Machine for turning irregular forms.



-.H. F. LOEWER. MAGHINE FOR \IURNING IRREGULAR FORMS.

APPLICATION FILED 00T.11,1909. 963,601 Patented July 5, 1910.

5 SHEETS-SHEET 1.

INVENTORi 1..M a-1 2% WITNESSES:

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H. F. LOEWER. MACHINE FOR TURNING IRREGULAR FORMS.

APPLICATION FILED 00111, 1909.

- I Patented July 5, 1910.

5 SHEETS-SHEET 2.

FIG.2.

WITNESSES: I INVENTOR:

THE mamas PETERS co, WASHINGTON, n. c.

H. F. LOEWER.

MACHINE FOR TURNING IRREGULAR FORMR. APPLICATION FILED 00111. 1909.

5 SHEETS-SHEET 3.

FIG.3.

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Patented July 5,1910.

H. F. LOEWER. MACHINE FOR TURNING IRREGULAR FORMS.

APPLIUATION FILED OUT. 11,1909. I 963,601 Patented July 5, 1910.

5 SHEETS-SHEET 4.

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H. Pi LOEWER. MACHINE ron TURNING IRREGULAR FORMS. APPLICATION FILED001211.1969.

963,601, Patented Ju1y5, 1910.

6 SHEETS-SHEET 5.

1; anmmnif WITNESS s: INVENTOR: /M/uu w W A 5402m HENRY F. LOEWER, OFROCHESTER, NEW YORK.

MACHINE FOR TURNING IRREGULAR FORMS.

Specification of Letters Patent.

Patented July 5, 1910.

Application filed October 11, 1909. Serial No. 522,189.

To all whom it may concern:

Be it known that I, HENRY FL' LOEWER, a citizen of the United States,and resident of Rochester, in the county of Monroe and State of NewYork, have invented certain new and useful Improvements in Machines forTurning Irregular Forms, of which the following is a specification.

This invention relates to machines for turning irregular forms, and theparticular object of the invention is to accomplish the turning of acertain piece of work in less time than has been required heretofore.This result is obtained by the use of a plurality of cutters, whichoperate simultaneously and independently on different portions of thesame block.

The present embodiment of the invention illustrates a last lathe, inwhich a pair of blocks, revolving in synohronism with a single model,are acted upon by two longitudinally-movable cutters, one of whichbegins at the middle of the block and turns 'it to shape from that pointto one end, and the other of which begins at the opposite end and moveswith the first cutter, turning the block to shape from the end to thepoint where the first cutter began. Two lasts are thus finished inone-half the time that is required on an ordinary last lathe to turnone, and therefore the machine herein described performs four times asmuch work as a lathe employing but one cutter and one block.

In the drawings :-Figure 1 is an end elevation of the complete lathe;Fig. 2 is a front elevation; Fig. 3 is a plan view; Fig. 4 is across-section (enlarged) on the line 44 of Fig. 3, the movable partsbeing in one position; and Fig. 5 is a similar view, the movable partsbeing in another position.

The machine has upright end frames 1, 1, connected by bolts 2, 2, andfront and rear upper rails 3 and 4, respectively. Said endframes supportthe driven shaft 5, which carries the drum 6. A countershaft 7 is drivenfrom the shaft 5, and carries a worm 8 that cooperates with a worm-wheel9. A pinion 10 on the latter drives a gear 11, and said gear engages arack 12 on the under side of the main cuttei carriage 13 (Fig. 4), andso moves said carriage along on the rails 3 and 4.

The carriage 13 is a U-shaped frame that is connected with a similarframe or car riage 14 (Fig. 3) by a right-and-left screw 15. By turningthe latter, the frames 13 and 14 may be moved toward or away from eachother, and are thereby maintained in the desired relative positions.Tongues 16 may be provided on one of said frames, which enter grooves inthe other, and so pre vent mis-alinement thereof.

On the front of the carriage 14 (which also slides on the rails 3 and4), is a bracket 17 in which is pivoted a circular cutter or knife18.Said cutter is revolved at a high rate of speed by a belt 19, thatpasses over a pulley 20 and the drum 6. A bracket 21 is also fixed tothe carriage 14 and revolubly supports a guide-wheel 22. This guidewheelis of the same diameter and thickness as the cutter 18, and lies in thesame vertical plane.

From the foregoing it will be seen that the cutter l8 and guide-wheel 22move together in a lateral direction, but are incapable of movement fromfront to back upon the machine. I

A second cutter 23 and corresponding guide-wheel 24 are carried onbrackets 25 and 26 that form part of a plate 27. Said plate extendstransversely to both the rails 3 and 4, and is slidable toward the frontor rear of the machine upon the carriage 13, in ways 28. A spring 29,one end of which is fastened to a pin 30 on the carriage 13, and theother end of which is fastened to the plate 27 tends to pull the latterforward continuously.

The cutter 23 is driven by a belt 31 that extends over the drum 6, andis held tight by an idler 32. The latter is hung on an arm 33 thatswings on the cutter-shaft, and is forced against said belt by theaction of acoiled spring 34. A similar idler 35 is provided for the belt19.

The model and the blocks from which the lasts are to be turned arecarried on spindies 36, 37 and 38. The said spindles are revolublysupported in frames 39, that are slidably supported in the end-frames 1,1, of the machines (Figs. 2 and 3). The frames 39 are tied together attheir front ends by rods 40, and at their rear ends by a shaft 41 thatis driven by a belt 42 from a countershaft 43. The frames 39 and thespindles 36, 37 and 38 constitute a reciprocatinglast-and-model-carriage.

The spindles 36, 37 and 38 are revolved synchronously by gears 44, thatare carried on said spindles, and mesh together. A.

pinion 45 meshes with one of the:

gears 44, and receives motionfrom the shaft 41 through a countershaft46, that is connected to said pinion. and said shaft 41. by bevel gears47 and 48, respectively. The axes of the cutters 18 and 23 are midwaybetween the axes of the spindles 37 and 38. The axes of the guide-wheels22 and 24 are in'the same position relatively to the spindle 36 that theaxes of the cutters are I with respect to the'axis of the spindle 38.

V s and the blocks A and '13 against the cutter 18. In 'the presentinstance said means are the springs 53, 53 (Fig. 3), the front ends ofwhich are fastened to the slidable frames 39, and the rear ends of whichare fastened to the machine-frames 1, 1. At the same time,

Q the guide-wheel 24 and the cutter 23 are pressed against the model Xand the blocks A and B, respectively, by the action of the spring 29.

When the machine is to be started, the

' carriages 13 and 14 are so placedon the rails 3 and 4 that theguide-wheel 22 is at theeenter ofthe model X, and the guidewheel 24 isat one end thereof (Fig. 3). The machine then being setin motion bysuitable means, the worm 8 and its connected parts feeds thecarriages 13and 14 together along therails 3 and 4, and the guide-wheels and cuttersmove correspondingly along the model X and the blocks A and B. At thesame time thespindles 3'6,

.. and 3'8,and'therefore the model X and the "blocks A and B, arerevolved as indicated in Figs. 4 and 5. As the model X revolves, anirregular surface ispresented to I the guide-wheel 22.. Some parts ofthe surface are nearer toth'e spindle 3'6'than other parts. Theguide-wheel being immovable transversely to saidspindle, and the model Xbeing held tightly against it by 'the springs 53, it follows that when apart of the model'face that is comparatively near the spindle36islpresen'ted to the wheel, the model must move backward,and when a partthat isfa'rther from said spindle -touches the wheel,'the model mustmove forward. For

instance, if the top of the instep of the model rests against the wheel22, as shown in Fig. 4, "the model '1S thrown forward. Afterv aquarter-revolution of the spindle 36,

' theside ofthe model rests against the wheel,

as shown in Fig. 5, and as this portion is nearer the axis of thespindle -36than the top ofthe instep, it follows that the model mustmovebackward to still press against the guide-wheel 22.

Whenever the model moves, the frames 39, the spindles 37 and 38, and theblocks A and B must also move. The latter are therefore brought into thesame position with respect to thecutter 18 that the model X occupieswith respect to the guide-wheel 22, and said cutter then trims theblocks A and B to the exact size of the model. As the spindlesr37 and 38revolve in opposite directions, the lasts areturned out as rights andlofts. i

The cutter 23 and guide-wheel 24, instead of having the blocks and modelpressed against them, are pressed against the said blocks and model,respectively, by the action of thespring 29. The latter is weaker thanthe springs 53, and the guide-wheel 24 and cutter 23 are thereforecarried backward when the model moves backward. But although the'model Xand the blocks A'and B may be moving backward under the pull ofthesprings 53, to press against the wheel 22 and the cutter 18, if adepression in the model is presented to the wheel 24, the latter iscarried forward into said depress'ion by the spring 29, and the blocks Aand B are cut by the cutter 23 to correspond with said depression.Similarly, if the model is moving forward, because of a greatlyeccentric port-ion beingin contact with'the wheel 22, the wheel 24 mayalso encounter-a hump on another portion of the model, and said wheelmust then move backward, together with the cutter 23, and the blocks Aand B are formed like the model all around.

It will be plain from the foregoing that although both cutters and bothguide-wheels move along the rails 3 and 4together, they.

do not move together in a direction atright angles to said rails, but,on the contrary, one cutter and guide wheel may move separately andindependently of the other outter and guide-wheel. The model is pressedagainst the front. of the immovable guidewheel in 'a backward direction,and the other or movable guide-wheel is pressed against the back of themodel in a forward direction.

As each cutter has to traverse only half the length of the'lasts orblocks A and B, it is obviousthat said lasts are turned out ,in one-halfthe time which would be required if the cutters traversed "the fulllength of the lasts. W

By adjusting the relative position ofthe frames 13 and 14, by means ofthe screw 15, the guide-wheels-may be movedfarther apart or nearertogether, (the cutters moving also) "toadjust the mechanism for lasts ofdifferent length. r

The general arrangement of the mechanism by which each cutter iscontrolled by the corresponding portion of the model is not a portion ofthe present invention, but is disclosed and claimed in my applicationfiled October 12, 1908, Serial No. 457,326, for improvements in lastlathes.

What I claim is 1. In a machine for turning irregular forms, thecombination with a suitable supporting frame, of a cutter-wheel with itscarriage, adapted to move horizontally across the supporting frame; amodel wheel on the carriage in fixed relation to the cutter wheel;another cutter-wheel andvmodel wheel in fixed relation to each othercorresponding to that between those first mentioned, located,respectively, adjacent to and horizontally in line with the model wheeland cutter-wheel first mentioned, and also carried by said carriage, buttogether movable across its line of travel; means for moving saidcarriage horizontally and revolving said cutters; and aspring-controlled frame, carrying revoluble stocks for the model andwork, respectively, movable at right angles to the movement of saidcarriage.

2. In a machine for turning irregular forms, the combination with asuitable supporting frame, of a cutter-wheel with its carriage, adaptedto move horizontally across the supporting frame; a model wheel in fixedposition on the carriage in the plane of the cutter-wheel; anothercutter-wheel and model wheel also on the carriage, also in one plane,and in fixed relation to each other corresponding to that between thosefirst mentioned, located, respectively, adjacent to and horizontally inline with the model-wheel and cutter-wheel first mentioned, but togethermovable across its line of travel; means for moving said carriagehorizontally and revolving said cutters; and a sprin controlled frame,carrying revoluble stoc (s for the model and work, respectively, movableat right angles to the movement of said carriage.

3. In a machine for turning irregular forms, the combination with asuitable supporting frame, of a cutter-wheel with its carriage, adaptedto move horizontally across the supporting frame; a model wheel on thecarriage in fixed relation to the cutter-wheel; another cutter-wheel andmodel wheel in fixed relation to each other correspondin to that betweenthose first mentioned located, respectively, adjacent to andhorizontally in line with the model wheel and cutter-wheel firstmentioned; a support for the cutter-wheel and model wheel last mentioned, movable on the carriage at right angles to its line of movement;means for moving said carriage horizontally and revolving said cutters;and a spring controlled frame, carrying revoluble stocks for the modeland work, respectively, also movable at right angles to the movement ofsaid car riage.

4:. In a machine for turning irregular forms, the combination with asuitable supporting frame, of a cutter-wheel with its carriage, adaptedtomove horizontally across the supporting frame; a model Wheel on thecarriage in fixed relation to the cutter wheel; a spring controlledframe, carrying revoluble stocks for the model and work, respectively,movable at right angles to the movement of said carriage, and normallyholding the model and work against the model wheel and cutter wheel,respectively; another cutter wheel and model wheel in fixed relation toeach other corresponding to that between those first mentioned, on asupport that is movable transversely to the line of travel of saidcarriage; means for yieldingly holding the movable model wheel andcutter wheel in contact with the model and work, respectively; and meansfor moving said carriage horizontally, and revolving said cutters.

5. In a machine for turning irregular forms, the combination with asuitable supporting frame,sof a cutter-wheel with its carriage, adaptedto move horizontally across the supporting frame; a model wheel on thecarriage in fixed relation to the cutter wheel; a spring controlledframe, carrying revoluble stocks for the model and work, respectively,movable at right angles to the movement of said carriage, and normallyholding the model and work against the model wheel and cutter wheel,respectively; a plate movable in guides transversely across thecarriage; another pair of cutter and model wheels, carried by said platein fixed relation to each other that corresponds to that between thepair first mentioned; a spring adapted to hold said last mentioned platein contact with the model and work, respectively; and means for movingsaid carriage horizontally, and revolving said cutters.

6. In a machine for turning irregular forms, the combination with asuitable supporting frame, of a cutter-wheel with its carriage, adaptedto move horizontally across the supporting frame; a model wheel on thecarriage in fixed relation to the cutter wheel; another cutter wheel andmodel Wheel in fixed relation to each other corresponding to thatbetween those first mentioned, located, respectively, adjacent to andhorizontally in line with the model wheel and cutter-wheel firstmentioned, and also carried by said carriage, but together movableacross its line of travel; means for moving said carriage horizontallyand revolving said cutters; a spring-controlled frame, carryingrevoluble stocks for the model and work, respectively, movable at rightangles to the movement of said car- 'riage; and means for adjusting saidpairs of model Wheels and cutter wheels horizontally with reference toeach other.

' 7. In a machine for turning irregular forms, the combination With asuitable, supporting frame; of a carriage movable horiof said carriage,and the other pair being supported in fixed relation to eachothercorresponding to that of the first pair but upon a support that ismovable transversely to the line of travel of said carriage; means formoving said carriage horizontally and revolving said cutters; and asprin controlled frame, carrying revolving stoc s for the model andWork, respectively movable at right angles to the movement 0 saidcarriage. HENRY F. LOEWER.

Witnesses:

D. GURNEE, L. TI-ION.

